PMP Mod is a Media player for the Playstation Portable console.
This revolutionary piece of homebrew allows you to play full resolution AVI files (DivX and Xvid) on your 1.50 PSP providing near UMD-quality video.
To understand the difference between PMP and SONY's MP4 format I made this test:
PMP vs MP4 filesize-based test, Robots Sample
Actual outputs, pictures taken with quicktime for MP4, Virtualdub mod for PMP.
MP4, 662 kbps, 2 pass, extra quality with nero recode:
Filesize: 470 mb
PMP, 611 kbps, 2 pass Xvid with Virtualdub mod:
Filesize: 465 mb
PMP delivers better quality, in smaller files, and at a higher resolution.
You can download PMP MOD from: http://pspchile.sytes.net/foro/showthread.php?t=129